Module: 01: A Simple Litter System
(c) 2003 by O.Conrad
Menu: Simulation > Ecology > Modelling the Human Impact on Nature
Description
A simple litter system model using the euler method. Carbon storage C is calculated in dependency of litter fall rate (Cinput) and rate constant for litter loss (Closs) as:
C(t + 1) = C(t) + (Cinput - Closs * C(t)) * dt
Typical values:
- Tropical Rainforest:
-- Litter fall rate: 500 [g/m²/a]
-- Litter loss rate: 2.0 [1/a]
- Temperate forest:
-- Litter fall rate: 240 [g/m²/a]
-- Litter loss rate: 0.4 [1/a]
- Boreal forest:
-- Litter fall rate: 50 [g/m²/a]
-- Litter loss rate: 0.05 [1/a]
Reference:
Hugget, R.J. (1993): 'Modelling the Human Impact on Nature', Oxford University Press.
Parameters
Name | Type | Identifier | Description | Constraints |
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Output |
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Results | Table (output) | TABLE | | |
Options |
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Time Span | Floating point | TIME_SPAN | | Minimum: 0.000000 |
Time Interval [a] | Floating point | TIME_STEP | | Minimum: 0.000000 |
Initial Litter Storage [g/m²] | Floating point | C_INIT | | Minimum: 0.000000 |
Litterfall Rate [g/m²/a] | Floating point | C_INPUT | | Minimum: 0.000000 |
Rate Constant for Litter Loss [1/a] | Floating point | C_OUTPUT | | Minimum: 0.000000 |